PART 1: GENERAL

  1. GENERAL REQUIREMENTS
    1. Refer to Construction Standard 22 05 00 Common Work Results for Plumbing for more information and requirements.
    2. Compressed air, vacuum, gas, and deionized water valves and outlets at accessible work stations shall be located within the reach range of a person in a wheelchair. Locate valves and outlets no more than 24” from the leading edge of the counter.

PART 2: SYSTEM

  1. COMPRESSED AIR
    1. General Requirements
      1. Verify with the OSU Project Manager the type and quality of compressed air required.
      2. OSU uses two types of compressed air systems: clean lab air and building air. Verify the type of air required with the OSU Project Manager.
      3. All systems to have redundant features to provide continuity of service during maintenance and/or repair.
    2. Lab Air System
      1. The compressed air system shall include the following:
        1. Air or water cooled one or two stage rotary screw or scroll type oil-free air compressor.
        2. An air dryer to match or exceed cfm of air compressor.
        3. An air receiver.
        4. A filtered intake to the compressor.
        5. Particulate filters.
        6. Activated Carbon Filters.
        7. Copper piping system cleaned for oxygen service.
        8. Preferred manufacturer: Quincy Northwest.
      2. Once through cooling water is not acceptable on water cooled units. Provide an integral heat exchanger and a cooling fan.
      3. “Oil-free” compressors, which depend on various seals to keep oil out of the air, or those equipped with oil filters located after the compression chambers, may be acceptable. Consult with the OSU Project Manager. Provide a receiver with a by-pass upstream of the dryer.
      4. Air dryers are to be either refrigerated type or the desiccant heatless, reactivated dual tower type. Verify with the OSU Project Manager the desired dew point (Desiccant -40 deg. F. -100 deg. F., Refrigerated 36 deg. F -40 deg. F.) and select the appropriate dryer. 
      5. Size the air intake filter for 150% of the compressor flow rate.
      6. Install a “coalescing” filter upstream of the dryer and particulate filter downstream of the dryer. Use Type 304 stainless steel housings. Install these devices in series with the gauges and isolation valves.
      7. Provide a bypass with valves for all filters and dryers to allow for routine maintenance without shutting down the building air supply.
    3. Building Air System
      1. The compressed air system shall include the following:
        1. Air or water cooled one or two stage rotary screw type oil flooded air compressor, or reciprocating air compressor
        2. A refrigerated dryer
        3. An air receiver
        4. A filtered intake to the compressor
        5. Particulate filters
        6. Coalescing filters
        7. Copper piping system
        8. Preferred manufacturer: Quincy Northwest.
          Once through cooling water is not acceptable on water cooled units. Provide integral heat exchanger and cooling fan.
      2. Once through cooling water is not acceptable on water cooled units. Provide integral heat exchanger and cooling fan. Size the air intake filter for 150% of the compressor flow rate.
      3. Install “coalescing” filter upstream of the dryer and particulate filter downstream of the dryer. Use Type 304 stainless steel housings. Install these in series with the gauges and isolation valves.
      4. Provide a bypass with valves for all filters and fryers to allow for routine maintenance without shutting down the building air supply.
    4. Piping
      1. Lab Air System
        1. ASTM 280 ACR Type L copper above grade, Type K below grade; wrought copper fittings, 15% silphos silver solder for OFA and Nitrogen. Piping must be installed while maintaining a continuous inert gas (argon or nitrogen) purge during the entire installation period.
        2. Identify all compressed air piping per general requirements.
        3. Cleaning of piping.
        4. The most important single requirement for the process gas piping systems is that they are suitable and capable of conveying a gas from the source to use point with no contamination.
          1. Order all pipe material, fittings, etc., to be cleaned by the manufacturer for “oxygen usage”, charged with nitrogen, and sealed at the ends prior to transportation.
          2. Each pipe length and fitting is to be individually inspected on arrival at the job site for integrity of the sealed ends and for physical injury (such as bends or flat spots).  Pipes with lost seals or physical damage are to be re-cleaned or rejected.
          3. Acceptable pipes are to be stored in a clean, safe location.
          4. Quantities of pipe cleaned at any one time shall not exceed that which can be installed within the same working days. No pipe may be installed if the plastic bags on the ends of the pipe are not “puffed up”, which indicates a loss of the N2 charge.
          5. Pipes, valves and/or fittings which do not comply with the cleaning standards (i.e. which show contamination at specified stages of the cleaning process) must be rejected and removed from the site.
      2. Building Air System
        1. Type L copper above grade, Type K below grade; meeting ANSI 11.1, wrought copper fittings, brazed.
        2. Identify all compressed air piping per general requirements.
    5. Valves
      1. Lab Air System
        1. All valves for the oil free air systems shall meet these specifications:
          1. Non-lubricated.
          2. Cleaned for “oxygen usage” at the factory.
          3. Packaged and sealed individually in heavy duty polyethylene bags with a nitrogen charge.
          4. Pressure rated for a minimum of 1.5 times working pressure.
          5. Inspected prior to installation by OSU Authorized Representative.
          6. Have an extension at each end (except flanged valves).
        2. Building Air System
          1. Ball valves shall have a three (3) piece design to permit servicing without cutting the pipeline.
          2. Check valves shall be spring loaded.
          3. Provide ball type shutoff valve and female connection on outlet of valve for connection by user. Verify with the OSU Project Manager exact requirements.
          4. Provide isolation valves at each floor, at each lab, and at each point of use.
             
  2. LAB VACUUM SYSTEM
    1. General Requirements
      1. Use direct drive hook and claw dry type unit. 
      2. System to include factory controls for unit staging.
      3. System shall include an appropriate sized receiver
      4. System shall include a liquid trap with isolating valves and drain before the receiver
      5. All Systems to have redundant features to provide continuity of service during maintenance and/or repair.
      6. Preferred manufacturer: Busch.
      7. Lab vacuum pump exhaust shall be a minimum of 16 feet above the roof line. 
    2. Piping
      1. Type L copper above grade; Type K below grade; wrought copper fittings, soldered.
      2. Use of schedule 80 PVC with solvent welded joints may be allowed in certain cases. Contact the OSU Project Manager for approval.
    3. Valves
      1. Ball valves shall have a three (3) piece design to permit servicing without cutting the pipeline.
      2. Provide a ball type shutoff valve and a threaded female connection on outlet of valve for connection by user. Verify with the OSU Project Manager exact requirements.
         
  3. GAS SYSTEMS
    1. General
      1. The quality of the specialty gas systems to be delivered should be suitable for the intended use.
      2. The OSU Project Manager will provide a list of gasses required on the project and the piping materials to be used.
      3. If extending an existing system the materials and cleanliness specifications shall match existing system. Only at the directive of the OSU Project Manager should variations from existing systems be made.
      4. Medical gas system piping shall be designed and installed per NFPA 99.
      5. Install seismic gas shut-off at meter prior to entry into building.
    2. Piping
      1. Where gas systems will be carried in copper piping use the above requirements for lab air systems.
      2. Where gas systems will be carried in stainless steel piping:
        1. Special cleaning requirements must be followed (see below for detailed description).
        2. Acceptable materials for gas systems, unless requested otherwise are:
          1. Type 316 stainless steel tubing
          2. Valves
          3. All valves for the cleaned dry air and Nitrogen systems shall be:
            1. Non-lubricated
            2. Pressure rated for a minimum of 1.5 times working pressure
            3. Inspected prior to installation
            4. Have an extension at each end (except flanged valves)
        3. Valves
          1. Ball valves shall have a swing-out center to permit servicing without cutting the pipe line.
    3. Accessories and supports
      1. The body material of pipe line accessories and specialty valves, such as pressure regulating valves, flow monitoring devices, etc., must match the material of the piping system, and internal parts shall be compatible with the particular gas.
    4. Cleaning of piping
        1. The most important single requirement for the gas piping systems is that they are suitable and capable of conveying a gas from the source to use point with no contamination.
          1. Order all pipe material, fittings, etc., to be cleaned by the manufacturer, charged with nitrogen, and sealed at the ends prior to transportation.
          2. Each pipe length and fitting is to be individually inspected on arrival at the job site for integrity of the sealed ends and for physical injury (such as bends or flat spots).  Pipes with lost seals or physical damage are to be re-cleaned or rejected.
          3. Acceptable pipes are to be stored in a clean, safe location.
          4. Pipes, valves and/or fittings which do not comply with the cleaning standards (i.e. which show contamination at specified stages of the cleaning process) must be rejected and removed.
             
  4. CHEMICAL SYSTEMS
    1. Acid resistant drainage piping, if required, shall be FUSEAL for interior piping, and Duriron for exterior piping.
    2. Duriron exterior piping shall extend to the manhole outside the building.
    3. Chemical drains shall run independently of the building system to a point outside the building before connecting to the building sewer.
       
  5. DEIONIZED WATER SYSTEM
    1. Consult with the OSU Project Manager to select the type of reverse-osmosis (RO) unit to be used.
    2. Steam powered or electrically operated distillation units are not to be used.
    3. Use membrane filters rated for industrial service.
    4. Distribution piping:
      1. Shall be 80 CPVC piping with no dead ends.
      2. Shall include a continually recirculating system to provide necessary cleanliness.
      3. Piping shall be properly flushed, cleaned, and sanitized before being placed into service.
    5. Provide isolation valves at each floor, at each lab, and at each point of use.
    6. Preferred company/supplier:  Resys
Last Updated: 
02/10/2020